Merge branch 'pipes-and-interceptors' into next-1

# Conflicts:
#	src/Concerns/Extendable.php
#	src/CoreExpectation.php
#	src/Expectation.php
#	src/Support/ExpectationPipeline.php
#	src/Support/Extendable.php

src/Exceptions/InvalidExpectationValue.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Exceptions;
+
+use InvalidArgumentException;
+
+/**
+ * @internal
+ */
+final class InvalidExpectationValue extends InvalidArgumentException
+{
+    /**
+     * @return never
+     *
+     * @throws self
+     */
+    public static function expected(string $type): void
+    {
+        throw new self(sprintf('Invalid expectation value type. Expected [%s].', $type));
+    }
+}

src/Exceptions/PipeException.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Exceptions;
+
+use Exception;
+
+final class PipeException extends Exception
+{
+    public static function expectationNotFound(string $expectationName): PipeException
+    {
+        return new self("Expectation $expectationName was not found in Pest");
+    }
+}